L-arginine and L-ornithine are complementary amino acids involved in the Urea cycle in humans...
Category - L-Ornithine
Ornithine is an amino acid that plays a role in the urea cycle. Ornithine is used for improving athletic performance. Taken in conjunction with arginine it may increase growth hormone secretion. However, many studies that showed these results are seriously flawed and inappropriate. The use of specific amino acids to induce growth hormone release may not be very effective in strength-trained individuals consuming high-protein diets. Diets high in protein apparently increase basal growth hormone levels